This section describes the procedure required for configuring native vSphere multipathing for XtremIO volumes. For best performance, it is recommended to do the following:. In vSphere 5. Alternatively, for an XtremIO volume that was already presented to the host, use one of the following methods:. The following procedures detail each of these three methods. Note: Use this method when no XtremIO volume is presented tothe host. XtremIO volumes already presented to the host are not affected by this procedure unless they are unmapped from the host.
Example: esxcli storage nmp device set —device naa. As an alternative, use the first method described in this section. When host configuration is completed, you can use the XtremIO storage from the host. When creating volumes in XtremIO for a vSphere host, the following considerations should be made:. Note: In XtremIO version 4. With vSphere, data stores and virtual disks are aligned by default as they are created.
Therefore, no further action is required to align these in ESX. With virtual machine disk partitions within the virtual disk, alignment is determined by the guest OS. For virtual machines that are not aligned, consider using tools such as UBERalign to realign the disk partitions as required. Note: This section applies only to XtremIO version 4. Following a cluster upgrade from XtremIO version 3. Note: File system configuration and management are out of the scope of this document.
It is recommended to create the file system using its default block size using a non-default block size may lead to unexpected behavior. Refer to your operating system and file system documentation. This section details the considerations and steps that should be performed when using LUN 0 with vSphere. Notes on the use of LUN numbering:.
Using this format, the required space for the virtual machine is allocated and zeroed on creation time. Thick Provision Eager Zeroed format advantages are:. To format a virtual machine using Thick Provision Eager Zeroed:. This section provides a comprehensive list of capacity management steps for achieving optimal capacity utilization on the XtremIO array, when connected to an ESX host. Data space reclamation helps to achieve optimal XtremIO capacity utilization.
Space reclamation is a vSphere function, enabling to reclaim used space by sending zeros to a specific address of the volume, after being notified by the file system that the address space was deleted. Guest level space reclamation should be run as a periodic maintenance procedure to achieve optimal capacity savings. On VSI environments, every virtual server should be treated as a unique object. Therefore, it is required to run space reclamation manually. RDM devices pass through T10 trim commands.
There are two types of VDI provisioning that differ by their space reclamation guidelines:. Therefore, running space reclamation on the guest OS is not relevant, and only ESX level space reclamation should be used.
My friend Cody has actually written it and indeed the conclusion was that you needed to wait until vSphere 6. Now I had never had an issue presenting more than devices with vSphere 6. So I quickly ran one and let the customer know I did not find a problem by providing this:. True enough if you are running a Pure array. Cody does work for Pure after all the orange gives it away. And there is no point in me talking about addressing further when you can read his good stuff. OK, then what was going on with our customer?
Paths — the other pitfall. For constrast we true that we have support for A storage container can have for example Scalability is main concern in using VVols in your point of view?
Those devices can be all regular devices, all VVols, or a combination of both. The number of VVols in a vSphere environment has no relationship to the number of LUNs or paths since the only device presented to the hosts is the protocol endpoint. A storage container is comprised of storage resources which can be assigned whatever size the administrator desires.
Both protocols provide similar benefits and the configuration tasks are nearly identical. Cable the hosts. Power on the ESXi host. Modify the following host BIOS settings to establish the proper boot order. Access Unisphere to view the Host Connectivity Status. Verify that the adapters are logged in to the correct SP ports. Select the new initiator records and manually register them using the fully qualified domain name of the host.
Do not store virtual machines within the datastore created from this LUN. Create a storage group and add the host record and the new LUN to it. Rescan the host adapter to force the host to discover the new device. This approach makes it easy to differentiate the boot volume from other LUNs assigned to the host. Begin the ESXi installation. Select the DGC device, and follow the installation steps to configure the host.
Refer to the vendor documentation for instructions to enable and configure the following for the iSCSI adapter: 1. Scan the target. Enable the boot settings and the target device. Add the newly registered host to the storage group. Proceed with the ESXi image installation. The VNX system addresses a broad range of application and scalability requirements, which makes it an ideal platform for vSphere. Each path or pair of paths for path counts greater than two should be connected to separate physical switches.
One possible exception is the HBA queue depth. This value is sufficient for most workloads, particularly when more than three hosts are accessing a device. The host adapter queue depth is Note: When altering the maximum queue depth, set Disk. SchedNumRequestsOutstanding to match this value.
If the multiple ESXi hosts are configured in a datastore cluster, the cumulative queue depth can quickly surpass the LUN queue. Unless you are familiar with the explanation provided, EMC recommends that you leave the queue depth at the default value of Fibre Channel zoning VNX uses single-initiator, single-target zoning.
Create two zones per initiator, with one zone configured for the host initiator and one storage processor A SP—A port, and the other zone configured with the host initiator and one storage processor B SP—B port. Virtual local area networks While IP storage systems do not use the term zoning, a similar Ethernet concept is applied through virtual local area networks VLANs on Ethernet switches.
Separate broadcast domains can be established using separate nonrouted subnets or VLANs. For these cases, use the Unisphere host initiator interface to create the new initiator records. Figure 13 shows how this registration works.
The peer SP provides a non optimal path that is used only when all optimal paths have failed or are otherwise unavailable. ESXi version 4. For vSphere version 5. Converged network adapters CNAs and FCoE software initiator support in vSphere 5 reduce the physical hardware footprint requirements to support the data traffic and provide a high flow rate through the consolidated network. Consider an FCoE software initiator with 10 GbE network switches to consolidate storage and switching equipment.
Create a new virtual switch to support the IP storage interfaces. For NFS, assign a network adapter. To prevent this from happening, use separate subnets or VLANs for the management and storage networks. Click Next. The Ready to Complete dialog box appears. Verify the settings, and then click Finish to complete the process. Furthermore, each iSCSI interface presents a unique iSCSI target, allowing initiators to be configured to connect to one or more targets in support of high availability and multipath technology.
Each port can support multiple virtual interfaces and be addressed across subnets and VLANs. In this illustration, a one-to-one relationship exists between the physical port and the subnet, and each port is configured with a separate subnet address. Thereafter, the adapter appears and operates as a host storage adapter similar to those within the vSphere environment. Configuration of the software initiator is provided through vCenter or ESXi command line utilities.
It focuses heavily on the software initiator, because proper configuration depends on understanding some topology nuances. Each VMkernel port depends on one or more physical network interfaces vmnics. VMkernel port group assignment VMkernel port groups are associated with the software initiator in one of two ways: explicitly through port binding or implicitly by configuring the initiator with a discovery address.
This option provides multipathing by binding multiple VMkernel port groups to the software initiator. Note: VNX is a multitarget architecture. While technically possible, port binding is not supported on VNX. With this configuration, no VMkernel port groups are bound to the software initiator. Paths that result in network or login failure are not retried. The addresses are visible in the static address tab of the vCenter software initiator properties window. Basic configurations use a single subnet which simplifies the configuration of the software initiator.
This results in one optimal and one non-optimal path to each storage pool LUN. Two networks are used for the host and storage addresses as illustrated in Table 2.
Assuming the networks are non-routable, the configuration results in four iSCSI sessions with two optimal and two non-optimal paths to each storage pool LUN. However, the additional sessions to the targets do not provide a performance improvement. Figure 17 Topology diagram for multiple-subnet iSCSI configuration Single network address space All of the ports are on the same subnet: Figure 17 illustrates a configuration that uses two subnets subnet To simplify this example, the endpoint or host component of the network address is the same for all interfaces.
Network traffic is restricted to ports that are assigned to that VLAN. In this configuration, two dedicated paths are available to each SP. This provides increased bandwidth to any LUNs presented to the host. Delayed acknowledgement is a TCP optimization intended to reduce network packets by combining multiple TCP acknowledgements into a single response.
However, in some cases, such as when a single virtual machine or ESXi host performs sequential writes, the VNX does not have any data to return. In this case, the host waits for an acknowledgement to its write, and, due to Nagle, the VNX groups multiple acknowledgments and waits for the timeout ms to elapse before sending them all in a single response.
0コメント